Paris Parties Like It's Her Birthday

10/7/2007 9:15 PM PDT

Paris Parties Like It's Her Birthday

TMZ cameras caught up with a sparkly Paris Hilton as she helped celebrate her sister Nicky's twenty-fourth birthday at Vegas Nightclub LAX on Friday night. When does this girl sleep?!

All eyes were supposed to be on Nicky, but Paris -- still surprisingly extension-free -- stood in the spotlight to give her lil' sis a birthday shout-out. Then, for the rest of the night, Paris danced wildly on a couch -- grabbing all the attention. What a bday surprise!